Concert apps are mostly fairly similar, bringing together the GPS functionality of your iPhone with show listing databases but not all of them work equally well, or offer the same features. Some show what bands are playing in your area, some allow you to search for and purchase tickets, and some let you enjoy live music. When you're looking for last-minute tickets or need to find something to do tonight, only a few perform reliably. Here is our list for the best iPhone apps for concerts.